Separator and the like



G. H. FRASER. SEPARATOR AND THE LIKE. APPLICATION FILED APR. 28, I915- RENEWED FEB. 6, .1922- '1 434,692, Patented Nov. 7, 1922:.

La 4 SHEETS-SHEU I.

INVENTOR WITNESSES:

'6. H. FRASER." SEPARA'TOR AND THE LIKE. APPLICATION FILED AP R- 28, I915- RENEWIfD FEB. 6, l922r Patented Nov. 7, 1922..

4 SHEETS-SHEET 2.

G. H. FRASER.

SEPARA-TOR AND THE LIKE.

APPLICATION FILED APR. 28, 19:5. RENEWED FEB. e. 1922.

1i 3h692 Patentefi N06. 7, 1922:.

4 SHEE-TSSHE%3. U a

INVENTOR WITNESSES:

G. H. FRASER.

SEPARATOR AND THE LIKE.

APPLICATION F!LED APR. 28. 19%5.

RENEWED FEB B 19-22.-

7 INVENTOR WITNESSES Patented Nov, 7, i922.

r a ranpp in r. on

l a l ilitia SEPARATOR AND 'JTHE LIKE.

Application filed April T 0 (LZZ whom it may come m:

Be it known that I, (drones lloicir FRASER, a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and cltate of New York, have invented an l mprovement in Separators and the like, of which the following is a specification. i

This invention relates to separatorsor sifters for separating line material from coarse, and aims to provide certain improvements therein.

Heretofore separators have been used with an inclined spring mounted screen over the top of which material to be screened has been distributed so that it could flow down the screen cloth, the cloth being arred to facilitate passage of the fine material through it andprevent clogging.

This invention aims to provide improvements in screens or separators especially applicable to the inclined screen type, and has for its objects to simplify such devices, facilitate their operation and manipulation, increase their efficiency and re es of adjustment, and attain compactness with great relative superficial screen surface.

To this end in carrying out the preferred form of the present improvements a sectional inclined screen surface is preferably provided, comprising preferal'ily a plurality of successive screen sections disposed one below another and preferably in different inclined planes so that they constitute a series of steps, in which case an interceptor, arrester or retarding dam is proferabl provided below each step, impact members acting simultaneously on two adjacent sections are preferably employed, springs or supports for two adjacent sections are provided, improved means for mounting, positioning and movably and adjustably carrying the screen sections are provided, and preferably means for adjusting the sections as a group in their angularity and means for relative y adjusting their inclination independently are provided, and improved distributing, feeding, collecting, scalping and jarring means are provided, and various features of improvement are provided, all of which will be more fully hereinafter set forth.

in the accompanying drawings, which illustrate the preferred adaptation of my present improvements,

Fig. 1 is a vertical transverse section of an inclined screen separator showing the preferred form of my invention;

showing the construction shown in F the main frame or casing, B the head fee $38, 1915, Serial No. 24,396. Renewed February 6, 1922. Serial No. 534,592.

Fig. 2 is a fragmentary side elevation thereof,v and Fig. is a fragmentary front elevation thereof, partly broken away to show the interior and partly in vertical section cut ap proximately on line 3-3 of Fig. 1, through the center of the head.

Fig. i is a fragmentary cross section cut on the line l l of Fig. 1, Fig. 5 is a frag mentar cross section cut on the line 5-5 of Fig. l, and Fig. 6 is a similar section cut on the line 66 of Fig. l, and looking in the direction of the arrows.

Fig. 7 an enlarged fragmentary sec tional view, cut on the same plane as Fig. 1, showing the spring on which the screens are resiliently mounted and showing details of the construction shown in Figs. 1 to 6.

. Fig. 8 is an enlarged fragmentary crosssection view, out on approximately the same plane as Fig. 6 and looking upwardly, showing details of the constrn ction shown in Figs. 1 to 6 5 Fig. 9 is an enlarged ij'ragmentary plan or face view looking downwardly on Fig. 7, with the covers removed;

llig. 10 is a section similar to Fig. 1 showing modification;

Fig. 11 is an enlarged transverse fragmentary crosssectional view similar to Fig, but showing a modified construction of j arring device; I

Fig. 12 is an enlarged fragmentary vertical sectional view of the modification shown in Fig. 11;

' Fig. 13 is an enlarged fragmentary crossseetional view similar to Fig. 11., but showing another modification of the jarring deice, and

Fig. 14 is an enlarged fragmentary vertical sectional view similar to Fig. 153. but 13.

.cferring to the drawings lie A indicate or distributmx, and C the screen or scr of :1 separator. Let D indicate the inlet material to be screened. l l the coarse 'ntlet it the fine outlet and {l the jarring mechanism.

These parts may be of any usual or suit; able constrnrtion and arrangement wnereoy the material to be SLrecned will he derirercd on top of the screens and line and coarse products will be separately removed, the. screen being "arred or vibratedv to PIP. 1t clogging during operation, but those she" comprise improvements incident to my invention which will be hereinafter more fully set forth.

Referring to the drawings I will now describe in detail the preferred embodiment of my improvements as illustrated therein.

The main frame or casing A preferably comp *ises relatively adjustable members or elements the one carrying the screen or screens and the other supporting it so that the angle of inclination of one can be adjusted relatively to the other to vary inclination of the screen clothing. As shown the casing comprises fixed or stationary outside walls II mounted preferably immovably at the lower ends on feet a and at their upper ends on legs 6, and on each is pivotally or removably mounted a back door or back wall I of relatively steep inclination, the side walls being open in front and connected by a cross-member or angle 0 at the bottom constituting the partition between the coarse outlet E and the fine outlet F, and by a memher or anglee at the top so that this element of the casing constitutes an open rectangular frame or shell preferably of steeper inclination than the screen clothing.

As shown the other element of the casing orshell comprises movable or adjustable side walls J preferably hinged at f to swing within the outer side walls II, connected at their upper ends by a cross-member or T g and at the lower ends by a cross-member or angle 7i, and open at their bottom and top sides below and above the screens, their outer lower edges being provided with a flange or member 2' to make rubbing contact with the fixed side H, to space the walls J therefrom and prevent leakage between these walls, and their upper edges carrying the separable sectional covers 7' which are removably and swingingly mounted thereon and serve to close the front or top of the casing.

The head B is mounted on the upperend of the fixed sides so as to be stationary therewith but separable therefrom.

IVhen thus constructed the screen casing comprises an expansible shell composed of relatively movable telescopic members either of which can be adjusted relatively to the other, or which together can be simultaneously moved to vary inclination of the easing. hen the inner casing is adjustable the adjustment is preferably effected by a. screw or other adjusting device It.

The screen or screens C are preferably carried from the adjustable sides J of the casing and movable therewith and relatively thereto, being shown as movably and elastically supported therefrom by being spring mounted thereon so that they will be shifted with the adjustment of the screen casing to their angle and may adjust themselves therein to suit the angularity requisite to the steps, abutments or impact members positioning them and may yield orvibrate when jarred. I

I prefer to construct the screen of a series or plurality of screen sections arranged one below the other in such manner that material flowing down the screens will pass from one to the next and to simultaneously jar the adjacent edges of two screen sections, and preferably I mount the successive screen sections in different planes each lower thanthe preceding one so that the screen clothing will be arranged in a series of steps and the material will fall from one to another in traveling down the screens. As shown each screen section consists of a rectangular frame or member Z on which the screen clothing on. is

attached and suitably stretched by adjustable compression screen rods it having exposed screw heads or provisions 0 by which they can be turned from above and in front of the screen, and these sections are super posed one directly on the next so that they make vibratory contact with one another to transmit from one to another the jarring effect and causethe adjacent edge of each to assume its proper position relative to theadjacent impact post or positioning member K so that the latter may act on both sections preferably by acting through one to the other, and I provide a plurality of impact posts K opposite the overlapping portions of adjacent screen sections, which preferably constitute the positioning abutments for holding the screen downwardly against the stress of their springs and have adjustable shoulders 79 by varying which or by substituting posts of other dimensions position of the screens can be altered to increase theangularity of one and diminish that of an adjacent section, or to make impact contact uniform across the screen, which shoulders abut against some p art of the casing as the underside of the adjacent dam or the edges of two covers j, and-project above the casing in the form of anvil heads 9 which may pass through notches in the edges of the covers as shown into position to be acted on by the jarring mechanism. As shown any cover may be swung upwardly or removed without interference from the adjacent anvil heads, and each cover can be raised from either end or lifted bodily without disturbing the anvils orthe. other covers. 7

Any method of spring or other support: for the screen or screens may be used, but according to the preferred form of my invention I provide leaf springs L for this purpose which are preferably mounted beneath the edges of the bars of the screen frame on a cross-bar r mounted on the sides J and carryinoa plurality of springs L so disposed that their upper ends will receive the upper edges respectively of adjacent screen sections and through them sustain the lower edge of the next upper section, being here provided with a hook or face which will engage the front of this edge to support the screen against forward descent so that the screen is elastically poised against descent in either (lircctioi'i, and the springs can ada it themselves to equalize their stress to the position of the screen. The bar 1" and springs L are provided for each screen sectioii so that the springs of the lower sections each cross one frame and the adjacent edge of the next upper section and these lower cries of springs thus assist in maintaining two adjacent sections while the uppermost series of springs at their upper ends serve to hold the upper edge of the first screen section suitably against the upper feed plate or member 6 which acts as a positioning abutment for this edge. The lowermost series of springs serve to hold the lower edge of the lowest screen section upwardly against the lower post K which as here-shown acts merely as a positioning abutment and is not acted on by the jarring mechanism. a My invention preferably provides an intermediate feed plate M at the top of each lower screen section for receiving material falling from the preceding section and deflecting it downwardly parallel with the screen clothing of the next section to save the latter from impact and wear from the falling material. This plate may be fastened on the upper edge of the lower section,

To prevent acceleration of flow affecting screening eiiiciency my invention provides means for retarding or arrest'nn; material flowing down the screen and redirecting it downwardly at reduced speed at one or more points throughout the screening); surface. This is preferably accomplished by providing a plurality of screen surfaces set in suc cession as described and by providing a dam or retarder N beneath. and spaced. apart from the lower extremity or side of each section so that it will intercept material that has left the latter, change its course and direct it to the next lower section, and preferably onto the refeeding plate M thereof.

The dam N is spaced in front of the section above it to allow a sufficientrearwardly and downwardly extending passage 8 for the material to descend between the screens and the dam and sufliciently above the next screen section to allow a refeeding passage 2f employedfor the flow of material onto the next screen. Each screen will 1 e so narrow that undue acceleration of down-flow will not occur before the material leaves the section, and the dam will be positioned to inin any suitable manner I prefer to mount them movably so that they will follow the movement of the lower edge of the next upper screen or move therewith or with both adiust a edges or participate in the jarring tin-spot and be independent of and disconnect-ed from both adjoining sections so that they may be removed without disturbing the dam.

My invention provides improved impact members if which are preferably movably and removably mounted on the adjacent dam as by having a male slideway a engag ing tubular brackets to fixed on the dam and out of the plane of the adjacent screen, so that the posts can be lifted off to permit swinging the screen up.

The ja"ring mechanism Fr maybe of any construction adapted to vibrating jarring or oscillating the screen surfaces and may be driven from any, suitable source, but my invention provides an improved construction designed to facilitate easy access to the screen sections, and preferably comprises swinging strikers or hammers above the posts it which. are preferably mounted on a rod or bar P extending from end to end of the casing J having portions or arms extending rearwardlyoutside thereofand pivoted to the sides thereof at a point between the movable and fixed sides of the casing sufficiently low for the strikers to acquire an approxiinatel; horizontal position as they strike the posts so that gravity may be eifectively used forgiving a hammer blow with the strikers despite the steep inclination of the screen casing. As shown the members P are lJ-shaped members or rods the legs of which are outside of the edges of the covers 7' and the center or cross-bar of which is opposite the meeting edges oftwo adjacent covers so that either cover can be moved without interference from the strikers and the screen frame can be entered or removed past the strikers.

The strikers are preferably swunn' or oscillated from the main driving; shaft t), of the feeder. by any suitable swinging or lost motion device as for example the cam 0) operating the lever 02 and connecting rod 1 Material y be fed directly to the to screen section, but my invention provides an improved means for removing any large pieces and conducting these away outside of the main casii ig an improved means for distributing the feed over the screen sections in a wide thin stream.

Preferably a coarse screen R disposed at an angle approximately at right angles to the fine screens is provided above the latter and receiving plate S beneath this directs material tine enough to pass it through a conduit onto the receivi plate or mem- ,er 6 of the top SCIQGIL and t ansverse tail chute T crossing the upper of the casing directs coarser material away to the rear. The screen R is preferably slidingly removably mounted on the upper end of the main casing and the chute T is separably connected to the outer sides H, comprising channels or members U which are fixedly bolted thereto at their lower ends and separably attached to the head. at their upper ends to support the latter from the stationary casing so that the head will occupy a definite relation to the feet. A back door a for the chute T permits observation of and access to the scalper screen R.

According to one feature of my improvements the head B comprises a vertically divided hopper W, a distributing conveyor X. and a feed trough V having adjustable tilting or inclined edges front and rear over which the conveyor may discharge material. coming from the hopper in a wide thin stream and distribute it from end to end of the screen. The head comprises a casing enclosing these parts and having feed spaces at front and rear of the trough and a tront feed bar 0, and rear feed bar d spaced apart to give the outlet 6 to the screen R, a swinging or removable semicylindrical cover f separably mounted on longitudinal bars 9 connecting the bearing ends Y and Z of the head. These ends are oreiterably ectional being parted vertically and'the head Y being rigidly bolted to the arm U so as to be'fixedly carried from the outer casing while the head Z is separably bolted to the head Y to be removable therefrom with the feed plate 0 its bar 9 and the hopper TV so that one half of the head may be removed to expose the internal'parts for removal or adjustment. On the inner face of each head Y and Z is flange 72. which supports the trough V, and permits it to be oscillated or adjusted to distort its edge to change the inclination thereof for adjusting the distribution of material over the edge. The trough V lays on these flanges and is held thereon by a disc t" which fitsin the trough and has a finger j engaging a notch in the latter so that the trough can be rotated with the disc. This disc has a. projection Z extending through a notch or slot m in the heads and engaged by adjusting screws 97/ by which the disc can be turned. The disc; is bored to fit the shaft Q, and has a neck 0 fitting a socket in the heads and a. flange 3) embracing the outer wall thereof to hold the disc axially in position.

Outwardly of the disc the heads have half round bearing sockets g in which the lower halt of the bearing sleeve or box fits and is held by a bolt .9 to keep the box from lifting out so that it will be concentric with. the head. A cap t for this box is bolted thereto through side ears which fit in notches u and in the bearing arm. A revolving washer o is keyed on the shaft between thedisc and the bearing to prevent dust travelling along the shaft to the latter. Intermediate of its ends the trough has a reinforced casting to on which. is pivotally vmounted an extraguard plate as for preventing material entering the hopper from falling over the back side of the trough and on which also is mounted a reinforcing angle 3 which can be tilted with the edge of the trough or independently of it to adjust the angle of the edge and later serve to keep the edge from openingup. The collars o engaging the outer sides of the bearings serve as thrust collars for positioning the conveyor and the drive pulley WV may be outside of either of these, this pulley and the shaft, conveyor and bearing heads and trough being rever sible bodily or in direction of drive, and the hopper and cover being reversible. The abutting faces of the heads Y and Z and the disc a" make sui'liciently intimate contact to prevent dust escaping through the slot In operation with the construction shown the. outer casing will be adjusted to the position desired for the hopper elevation and then fixed in position. The inner casing will then be adjusted to give the desired angularity for the screens as a group. .The

knockers will be slacked, varied or adjusted.

to give desired relative angularity for each screen section; and the conveyor trough will be adjusted to properly'distribute'material. The driving pulley will revolve in either direction and material will be spreadacross the scalping screen and that fine enough pass through it to the fine screens down which it will flow successively being alternately retarded and re-ted in its passage to the coarse outlet. The line material passing the screens will flow down the relatively steep bottom to the fine outlet. Impactive jarring of the screens will be transmitted through from one sect on to another to avoid clogging. Operation will be observed by.

lifting any front door, and any screen section will be removed through its corresponding door. To repair orreplace a conveyor section the movable half of the head P will be disconnected thus exposing longitudinalparts for access or removal.

It will be seen that my invention provides improvements which can be readily and advantageously availed of and it will be understood that the invention is not limited to the particular details of construction, arrangement or combination of parts set forth as constituting its preferred form since my improvements can be availed of in whole or in part according to such modifications, adaptations or combinations as circumstances or the judgment of those skilled the art may dictate without departing from the spirit of the invention.

One such modification is shown in Fig;

being adjustable by dropping washers in the sockets beneath the springs to increase their tension. The screei'i trames are here shown as supported forwardly by rollers a", and upwardly by the tubular brackets Z) through which the impact rods K loose- 1y operate, these being plane bars on the upper ends of which the hammers O strike. The upper hammer lever P is here shown as a link-which is lifted by the cam 1) which is on a shaft opposite the junction of two screens and clears both adjacent covers sufliciently to permit these to be removed.

The pulley for this shaft operates in the space between the sides J and H, and the lever for the lower hammers is fulcrumed in this space and its upper end projects under'and is operated by this cam.

In this construction the lower end of the lower screen is vibrated by a spring impelled impact post K", shown on a larger scale in Figs. 11 and 12, inwhich it will be seen thata coil spring 0" workingin the tubular abutment guide 6 presses the post down in its guideway at" when its roller 6 is released by its cam f". This permits a very strong impactive blow, and the spring is shown as a little short to avoid constant pressure of the bar on the screen.

A step or horizontal cross-bar g" is here shown by which the operator can stand on the apparatus without danger of injuring or interfering with the operating parts.

In Figs. 7 and 8 the roller a is shown seated. in a notch h in the bracket 2?,

which bracket has a curved top wall 2'" fitting under the overlapping edge of the top screen and a curve or recessed wall j fitting over the upturned edge of the lower screen to prevent leakage between these. It is also shown as having a side guide or hook'lc for guiding the upper and lower screens, and having a recess Z for clearing the projecting clothing between them, and each of these springs is shown as united by a sliding hook m by which they can be separably locked together to insure intimate contact and avoid bowing. 1

Figs. 13 and is show a jarring mechanism in which the bracket 6 is a single casting extending through and notched out for the dam bar so that a long spring can be used. In this construction the bar has rollers at each. side and is operated by two cams or a double cam to lift it. The bracket has a notch or groove in which the spring holding pin slides, which prevents the post to swing upwardly with the latter the top is swung on its hinge a situated just below the hinge of the e What I claim is:

1. In combination, an inclined screen comprising two or more separably mounted similarly inclined successive relativeiy rcmovable screen sections disposed successively in the direction of their inclination one below and in a lower plane than and receiving material flowing over another, and jarring mechanism acting downwardly simultaneously on adjacent parts, of two of said sections. 7 i

v 2. In combination, an inclined screen comprising two or more separably mounted similarly inclined successive relatively re-' movable screen sections disposed one sucsively in the direction of their inclination one below and in a lower plane than receiving material flowing over another, and at their adjacent horizontally extending edges one removably sustaining another.

I 3. In combination, an inclined screen comprising two or more separably mounted slmilarly inclined successive relatively removable screen section disposed one sue cessive to another in their direction of inclination one below and receiving material flowing over another the adjacent horizontally extending portions of two of said sections being in removable contactand' affording a closure between such sections.

i. In combination, an inclined screen comprising two or more separably mounted similarly inclined successive relatively removable screen sections disposed successively in their direction of inclination one below and receiving material flowing over another, and a spring exerting an upward stress against adjacent parts of two of said sections.

5. In combination, a casing forming an inclined chamber, a removable inclined screen movably mounted in said chamber, adjustable supporting-means on which said screen is resiliently andremovably mounted adjustably mounted on said casing and adjustable to vary the inclination of said screen therein, means for movably positioning said screen relatively to said support 'ing means, means for jarring said screen relatively to said support above said screen for directing material to be screened over Sit-1d screen in the direction of its inclination, and retarding means above said screen DJOValJl with and sustained by said supporting means and disposed inthe path of such material for retaromg its speed of flow over said screen.

6. In combination, an inclined screen comprising two two or more separably movably and resiliently mounted similarly inclined screens disposed successively in their direc .tion of inclination one below and in a 'difmovsmle re ferent plane than and receiving material flowing over another, having adjacent horizontally extending portions, means for jarring two of said screens, and a movable member intermediate of adjacent portions of two of said screens torreceiving material flowing over an upper screen and diverting it on to the next lower screen disposed in operative relation to two of said screens for transmitting the vibration of their adjacent portions from one to another.

screen, and means opposite and below said bar resiliently sustaining adjacent portions of two of said screens.

8. In combination, a screen comprising a casing having side members, an inclinec screen mounted intermediate oisaid side members, jarring mechanismfor said screen, and swinging hammers comprising U-shaped members pivoted to said casing at the sides of said screen and extending across said cacing opposite" said jarring mechanism near the edge or said screem'whereby the latter can be removed intermediate of the a of said swinging members.

9. In combination, an inclined screen, having upper and lower edges and movable and removably mounted, a casing therefor comprising side members, impact posts 'en gaging one of said edges of said screen, and strikers acting on said posts and disposed opposite the edge of said screen wh reby the latter can be moved past said sJrikcrs.

10. In combination, an inclined screen, a casin therefor comprising adjustable in enibers on which said screen is mounted andstationary members on which saidgadjustable members are mounted, a bottom wall carried by said stationary members, and a top wall 1 atively to said bottom wall ano carried by said adjustable members ll. In combination, an inclined screen, a casing therefor comprising open topped side walls between which said screen is re movably mounted, impact posts above said casing acting on said screen, and two separr. ly movable covers closing the top of said casinghaving their adjacentedges near the line of said posts and above and below the latterrespectively. p "1 12. In combination, an inclined screen, a

an exp ansible li 1 access top for the top of said casing movable relatively to said casing and holding to position said posts,

13. In combination, an inclined screen.

means for jarring said screen, casingaila chamber for 4 d screen comprissaid screen, top [B10018 said screen, and relatively movable complementary side jwalls intermediate of sa top and bottom walls lapping and cofio ailord r i ansible side walls the sidesyof said screen affording a closure for said casing' tiesides of said screen.

i c mbination, casin providing an inclined chamber having an open upper end, a removable inclined fine screen mounted in said chamber, a second casing providing an inclined chamber having an open lower end communicating with and-separably mounted on the upper end of said first casing, aseccnd inclined screen mounted in said second chamber for delivering screened material to said first screen, leak preventing means overlappingand affording a recess'for receivin the upper edge oi said first screen below said second screen 7 receiving screenedmaterial from said second screen and diverting it in the direction of inclination of and or to said fine screen, and means above andl ext past said fine screen provl ling a cone at from said second chambert'o without said first chamber for receiving coarse material passing over said second screen and conducting it out oi-contact with saidfirst screen. i

15. In combination, a casing providing an inclined chamber, a removable inclined screen mounted in said chamber comprising 1e and a screen clothing mounted thereon, a retarding member mounted in said chamber below and spaced apart said posts from. the lower edge of said screen, and

means for adjusting the tension of'said screen clothing by expanding said frame comprising a compression member between theupper and lower parts of said frame-for expanding these hav g a portion for operating it exposed below and accessible-beth the lower edge of said frame and the adgacent part of said retarding means.

16 In combination, an inclined removably mounted screen comprising a horizontally expansible frame and a screen clothing mounted-thereon, casing providing a chamber and comprising side walls spaced apart from the sides of said frame and affording a. space for expansion of said frame, and means for expanding said frame horizontally to vary the tension of said clothing comprismg a horizontally extending compression member between the side membersto said frame and having a screw thread and a portion exposed and accessible in the space between the side of said frame and said side walls by which to adjust said member with out removing said frame, and said frame having a screw thread engaged by said first mentioned screw thread for expanding said thread.

17 In combination, an inclined screen and a casing therefor comprisingan inclined top wall, and an impact post engaging the top of said screen and comprising an adjustable sliding member interposed between said screen and the top wall of said. casing and projecting above and adjustable relatively to the top wall of said casing.

18. In combination, an inclined resilient removable screen second inclined screen above said resilient screen and having a lower part overlapping the latter, and means intermediate of the lower part of said sec- 0nd screen and the upper part of said first screen for receiving material from the upper one and directing it on to the lower one for preventing leakage of material over the upper edge of said lower screen and one of said screens movable relatively to the other.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses,

GEORGE HOLT FRASER. Witnesses:

GUSTAV SOHONHEIT, SIGVARD G. HELLEM. 

